Instructional Literature
Page
208
Effective: May 2008
Instructions for the FP-6000 Protective Relay
For more information visit: www.eaton.com
IB02602004E
Phase Reversal
When any two phases become reversed.
Phase Unbalance
Deviation of the percentage of nominal line voltage between any two phases.
Point
To position the pointer so that it is resting on the desired item on the screen.
Pointer
The hollow white arrow that you can move around the screen using the mouse.
Pop-Up Screens
A screen that displays access to a PC program function, prompting you to enter additional information.
Power Flow
Power Flow is the direction of power flow for each harmonic, and is defined as the sign of a positive power
flow. WATTS = [Id*Vd + Iq*Vq] for that harmonic. Thus, a positive power flow is power into the load, and a
negative power flow is power being generated by the load. Power should be greater than 2% of the full
load to be sure the result has significance. Zero power should default to a positive power flow.
Reactive Power (VARs)
Reactive power or energy associated with the displacement power factor is power factor correctable
(Volt-Amperes Reactive). It is sometimes referred to as the “Q” or “Q-Hours.” Calculation of the “Q” will
use the technique of multiplying voltage samples by the associated current samples taken 90° earlier.
Thus, a leading power factor will follow the convention of being positive.
Real Power (Watts)
Real power is computed by summing the product of the individual current and voltage readings over one
cycle.
Right Mouse Button
The secondary mouse button, unless you have configured your mouse differently. Use the right mouse
button only when specifically instructed to do so.
rms
The rms value of a quantity X follows the standard definition of: With sufficient sampling, harmonics will
be included in the rms values.
RS-232
A standard that defines the electrical characteristics of a widely-used serial communication link.
T/H
Track and Hold.
THD
Total Harmonic Distortion is the ratio of the rms of the harmonic content to the rms value of the
fundamental quantity, expressed as a percent of the fundamental where n is the highest harmonic value
available.
TOC
Time Over Current protective function – typically Inverse Time.
VA, VB, VC
Phase voltages for phases a, b, and c respectively.
VAB, VBC, VCA
Line-to-line voltage between phase a & b, phase b & c, phase c & a respectively.
VT
Voltage Transformer.
VX
Voltage measured on differential voltage input (VX1-VX2).
Waveform data
The numeric oscillographic values that may be captured. These values can be retrieved by PowerNet or
PowerPort.
Window
An area of the computer screen that displays an application.
RTD
Resistance Based Temperature Device.
AZC
Auto Zone Coordination.
Var
Reactive Power.
RI
Reclose Initiate.
